The calculators run entirely in your browser. Inputs are kept in the page address (so you can share a result) and are not sent to us.
We use optional Google Analytics 4 only after you choose Allow analytics. Rejecting leaves Google Analytics unloaded. Analytics measures page visits and basic device and browser information; Google processes this data and may set first-party Analytics cookies. Calculator inputs, uploaded files, query strings and address fragments are excluded. Advertising storage, Google signals and advertising personalization are disabled. Only recognized search-engine origins may be sent as referrers. Your consent choice is stored locally for up to 180 days. Use Analytics preferences in the footer to change your choice or withdraw consent and remove Analytics cookies. Fonts are served from this site.
Analytics disclosure updated October 24, 2026.